Find Sum of Digits of a Number

In this blog we will know how to find sum of digits of a number. 

using System;

using System.Collections.Generic;
using
System.ComponentModel;
using
System.Data;
using
System.Drawing;
using
System.Linq;
using
System.Text;
using
System.Windows.Forms; 

namespace
Find_sum_of_digits_of_a_number
{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }
 
        private void button1_Click(object sender, EventArgs e)

        {

            int sum = 0;

            int num1 = int.Parse(textBox1.Text);

            int num2 = num1;

            while (num2 > 0)

            {

                sum += (num2 % 10);

                num2 /= 10;

            }

            MessageBox.Show("Total sum of the digits is:"+sum.ToString());

        }

    }

}